Fosi Audio DS2 User manual

Brand: Fosi Audio

Model: DS2

Category: Headphone amplifiers

Type: User manual

Fosi Audio DS2 is a high-fidelity headphone amplifier that offers exceptional sound quality and versatility. Equipped with dual ESS ES9018K2M QUAD DAC chips, the DS2 delivers powerful output with low distortion and high signal-to-noise ratio. It features both 3.5mm single-ended and 4.4mm balanced headphone outputs, accommodating a wide range of headphones. The DS2 supports a variety of audio formats, including PCM up to 32bit/768kHz and DSD up to DSD512. It can be easily connected to various devices such as smartphones, tablets, laptops, and computers via its USB-C input.

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整本白色，骑缝钉，材质：铜版纸，尺寸：展开（80 mm *110 mm)

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Thank you very much for purchasing the

DS2 headphone amp.

Please read the instructions carefully before

using the product.

If you have any problems or suggestions for

the product, please feel free to contact us

via email. We are always at your service.

Email address of our technical support

team: [email protected]. Click the volume up and down buttons

simultaneously once to switch be-

tween high and low level mode.

1. Connect the DS2 to your Android phone using a USB

Type-C cable. (Note: Some Android phones or music

players may have compatibility issues due to system

and hardware differences, and some phones require

the OTG function to be enabled in order to use the DS2

properly.

2. When connecting the DS2 to a device with a light-

ning connector, use a lightning to Type-C OTG cable.

(not included in the package)

3. When playing music on your computer, please select

Fosi Audio DS2 as the audio output device for your

computer.

4. Volume control may not be available for some devic-

es in exclusive USB audio access mode.

5. The DS2 does not have a built-in battery, so the DS2

draws power from the main unit via the USB port.

Actual power consumption is related to operation and

the device system. The DS2 has two built-in audio-

phile-grade DAC chips. It is normal for the DS2 to get

hot during use.

1. If the DS2 is charged via USB from a

mobile phone or computer, it will con-

sume their power.

2. The DS2 uses a high performance

DAC/Amp chip and it is normal for it to

get hot during use.

3. Please adjust the volume to the right

level before wearing the headphones to

protect your hearing.

4. Please do not wear headphones when

plugging them in or out to avoid sudden

impulse noise that may damage your

hearing.

BRING THE SOUND TO YOUR HEART

User Manual

Model DS 2

DAC Chipset

Output Power

S/N

Frequency Response

PCM

DSD

Dynamic Range

Recommended

Headphone Impedance

Dual Headphone Outputs

Supported Devices

Product Name

Weight

Dual ESS ES9018K2M

QUAD DAC Chips

SE: 120mw(32Ω)

BAL: 250mw(32Ω)

16~300Ω(SE);

16~300Ω(BAL)

3.5mm single-ended,4.4mm

balanced output

108dB

20HZ-20KHZ +/-0.5dB

Up to 32bit/768kHz

DS 2

15g

Mac\Windows\ iOS\ Android

DSD64/128/256/512

108dB

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The DS2 does not have a battery and therefore

consumes power from the device. When connect-

ing the DS2 to a mobile phone or other device,

please plan power consumption wisely.

2The DS2 is small in size but has a high output

power. The temperature rise is about 15°C during

operation. It is normal for it to get a little warm

during use.

On some mobile phones or DSD playback soft-

ware, the volume buttons on the DS1 body cannot

be synchronised to control the volume of your

mobile phone, you can control the volume directly

from your mobile phone.

Some phone power management policies do not

allow third-party apps to run in the background by

default. This may cause the APP to pause in exclu-

sive USB audio access mode after the phone has

slept for a few seconds. You can manually set the

app to keep working while sleeping in the phone's

battery management settings.

Running other apps in exclusive USB audio access

mode may cause lagging or no sound issues. We

will continue to optimise this issue. If you are using

exclusive USB audio access mode, we recommend

that you focus on listening to music. Alternatively,

you can exit the exclusive USB audio access mode

to avoid this problem.



To play DSD files on the Android devices, please

use an APP which supports DSD files (e g. "HiBy-

Music APP") and enable the exclusive USB Audio

Access Mode. The DSD output option should be

set to DOP or Native. DSD512 is only supported in

Native mode.

The computer operating system is window 7.

Please do not use any 3.5mm to 4.4mm adapters

as this may result in no sound, stuttering etc.

during use.

2To play DSD songs. (Note: but you do not need to

install the driver if you are using foobar and have

installed its own Waspi plug-in to play DSD songs).

3Play PCM 768KHZ songs.

4When the interface of your device is USB1.0.

When you encounter the above problems, please

first contact Fosi Audio after-sales service to obtain

the DAC driver, and install it as the instruction to

enable the USB DAC function.

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

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The DS2 does not support in-line remote control

with a headset or answering calls with a headset.

Here is the known situations:

Due to system and hardware differences in exclu-

sive USB audio access mode, some Android

phones or players may have some permission con-

flicts and compatibility issues.

When there is an incoming call, the sound is still

transmitted through the phone's speaker and

microphone. You can pick up the phone to make a

normal call. Whether or not you unplug the DS2 will

have no effect.

It is recommended to use 4.4mm

headphones directly.



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

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

[Android-based phone]: Just use the Type-C to

Type-C cable to connect the DS2 to a mobile

phone( cable is included in the package).

2To play DSD files on the iOS devices, please use

an APP which supports DSD files (e.g. "HiByMusic

APP") and set DSD output option to DOP.(Note:

iOS devices cannot support DSD512 currently. )

3To play DSD tracks on the computer, please use

the software which supports DSD files (e.g.

"Foobar 2000 on window or Audirvana on mac")

and install the relevant application plug-ins

correctly.

4Switching tracks with different sampling rates will

cause relatively obvious impulsing sound which is a

normal phenomenon. It is recommended classify

music files well.

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

The DS2 can be used plug -and

-play on window 8/10 and does

not require driver installation.

[Windows system]. 1

Macbook does not require driver installa-

tion. Select Fosi Audio DS2 directly as the

output device.

[Macbook].

Connect the DS2 to your comput-

er using a Type-C to Type-C

cable. (If your computer's USB

port is USB A, you can use a Type

C to USB A cable to help you with

this) (included in the package).

Select the Fosi Audio DS2 as the

audio output on your computer.

A compatibility issue may occur to certain

Android mobile phones or music players due

to system and hardware differences.

Notes:

[iPhone/iPad]: Please purchase an additional Light-

ning to Type C OTG cable to connect DS2 to

iPhone / iPad / iPod.

Some mobile phones are required to turn on

the OTG function, so as to use the DS2

normally. For detailed settings please consult

the support of mobile phones.

Only iOS 10.0.2 and above are supported.

Due to the iOS system itself, Apple devices

below this version cannot be supported.

Notes: 1

Since there is a limitation on the power supply

to external USB devices from iPhone, DS2

with high output power may have stuttering or

no sound problem at high volume.

Some mobile phones may show the "non-certi-

fied Type-C digital headphone" notification. You

can ignore the message and use it normally.



Fosi Audio designs and builds innovative audio

products with all your music fully in mind. Outstand-

ing sound, simple but elegant design, high-quality

materials and truly useful features are what Fosi

Audio is all about. We sincerely hope you get as

much pleasure from our products as we do from

creating them!

Our website: www.fosiaudio.com

Amazon store: www.amazon.com /fosiaudio

Our Youtube channel: Fosi Audio

Facebook page: Fosi Audio

After-sale Service and Technical Support Email:

[email protected]

Type-C to Type-C USB-C to USB-A

User Manual

DS2 User Manual

USB Type-C connector

Indicator light 4.4mm balanced

headphone out

Volume – 3.5mm single-ended

Volume +

Low

level

mode

DSD

PCM

DSD

Bright

Bright Bright

Bright Purple

Yellow

Bright

Red

Blue

High

level

mode

Output

Mode

Audio

Stream

Format

Red

Light

Green

Light

Blue

Light

Display

Colour

Fosi Audio DS2 User manual

Brand: Fosi Audio

Model: DS2

Category: Headphone amplifiers

Type: User manual

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Fosi Audio DS2 User manual

Fosi Audio DS2 User manual

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